Powder cylinder replacing device of 3D printer

The utility model relates to the technical field of printers, in particular to a powder cylinder replacing device of a 3D printer, which is convenient for replacing a powder cylinder, improves the working efficiency and enhances the practicability. Comprising a female cylinder, the replacement mechanism comprises a forming cylinder, a handle is fixedly installed on the forming cylinder, an installation groove is formed in the female cylinder, two T-shaped sliding rails are fixedly installed on the installation groove, two cushion blocks are fixedly installed at the bottom end of the forming cylinder, T-shaped grooves are formed in the two cushion blocks, and the two T-shaped grooves are slidably connected with the two T-shaped sliding rails correspondingly; a trapezoidal inserting block is fixedly mounted on the forming cylinder, a clamping groove is formed in the trapezoidal inserting block, an inserting groove is formed in one end of the mounting groove in a communicating mode, the trapezoidal inserting blo